Ore-concentrating machine



July 1, 1924 C. J. WILLIAMS ORE CONCENTRAIING MACHINE Filed Jan. 22 19212 Sheets-Sheet l Ira/awn" July 1, 1924; 1,499,341 Cr J. WILLIAMS ORECONCENTRATING MACHINE Filed Jan. 22 1921 2 Sheets-$heat me nt 77 m g,

Patented July 1, 1924.

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CHARLES JO'HN WILLIAMS, OF CBOYDON, ENGLAND.

ORE=CONGENTBATING MACHINE.

Application filed January 22, 1921. Serial No. 439,106.

To all whom it may concern:

Be it known that CHARLES JOHN WIL- LrAMs, subject of George V, King ofGreat Britain and Ireland, residing at 6 Lennard Road, Groyclon, in thecounty of Surrey, England, has invented certain new and usefulImprovements in Ore-Concentrating Machines, of which the following is aspecification.

This invention is intended for application primarily toore-concentrating machines though, in respect of certain of itsfeatures, it is equally applicable to shaking screens, sifting machinesand the like.

The chief object of the invention is to improve the construction andoperation of machines of the class referred to in respect of the headmotion.

The range of adjustability of the tablestroke obtainable by means of theadjustable toggle seat-block employed in previously constructed oreconcentrating machines 1s subject to certain important limitations,usually ranging from about minimum to 1%" maximum. This is a defectwhich renders such machines unsuitable for the efficient treatment ofgrades or classes of ores requiring a stroke either below or above theselimits. Now, by this invention, this defect is overcome by makingprovision for extending these limits in both directions so that thestroke can be varied from any required minimum, no matter how small, toany required maximum.

-According to this invention, the motion of the pitman is obtainedpreferably by means of an eccentric of variable throw instead of,

as heretofore, by means of a crank of fixed throw. It is this eccentricof adjustable throw which, by enabling the length of travel of thepitman to be varied, renders it possible 'to widen the range ofadjustability of the stroke of the table.

In order that this invention may be the more clearly understood andreadily carried into efl'ect, I will proceed to describe the same withreference to the accompanying drawings, which illustrate the preferredconstructional form of this invention and the application of the same,by way of example, to an ore-concentrating table of the Wilfiey type.

Figure 1 is a vertical longitudinal section through the head-motion.

Figure 2 is a section substantially on line 22 of Figure 1.

foundation channels of the machine on;

which is fixed the lower base plate I) wherein is mounted the drivingshaft 0. Mounted on the shaft in the manner presently to be described isthe eccentric sheave d which carries the strap 6 of the pitman e whoseupper end has seated therein the inner ends of the toggles 7"v and f theouter ends of which are seated on a yoke gand stroke-adjusting block hrespectively. The periphery of the eccentric sheave is rounded and thestrap is shaped to correspond. Thus, the pitman is enabled to adaptitself to any twisting or lateral movement to which it may be subjected,thereby increasing the smoothness of running of the machine.

The yoke g is attached rigidly to the thrust bar 9 which is surroundedby a compression spring j bearing at its ends a ainst loose flangedrings 7' and 3' respec ively. The ring j bears against the yoke g andthe ring 7' bears against an end cover which is screwed into a casing 7'and forms a bush within which the tail of the thrust-bar works. Thecasing j encloses the spring and is fixed to the upper portion 6 of thebase plate. By means of the screwed cover 7' the tension of the spring3' can be regulated. i 4

The thrust bar g is straight and solid and extends through the headmotion, and

through thebearing 6 being connected at its front end to a swivel head gwhich in turn is connected to the thrust-bolt tor the table Surroundingthe neck of the draw-bolt is a plate 70 which is secured to the top endof the table. In order to remove the draw-bolt it is merely necessary toremove the plate 70 and the bolts 10*. The upper-end of the pitman, alsothe stroke adjusting block, are made saddle shaped or forked so as tospan over the thrust-bar.

It will be noticed that the thrust-bar and compression spring are indirect line' with the table. By this arrangement, side strains areavoided, the machine works very smoothly and there is only the minimumof.

wear on the'bearing V.

Z is a sleeve which is rotatably. mounted on the driving shaft 0, Z andZ are driving discs which are fast on the shaft and are 'in Figure l.

provided with a pin Z whereon the eccentric sheave'cl is pivoted. Thesheave sur ounds the sleev Z, and the disc Z is h d to the shaft bymeans of a screw Z whose inner end passes through a transverse slot afurther sleeve Z The two sleeves are clutched together along the brokenline Z but are made separable from one another for convenience ofassembling and dismantling.

The sheave (Z is provided with a slot (Z which is concentric with theaxis of the pivot pin. The sleeve Z and the slot (Z are provided withteeth Z and (Z respectively which mesh with one another.

The end of the shaft which is remote from the drivino' and loose pulleysm and m respectively 1S provided with a key and has mounted thereon aclutch Z which is interiorly slotted so as to be a sliding fit on thekey. This shaft clutch engages with a clutch Z which is fixed to theouter end of the sleeve 2".

In order to vary the throw of the eccentric sheave, and, therefore, thetravel of the pitman and with it the angular movement of the toggles,the screw Z which screwed into the shaft and normally keeps the twoclutch-members in mutual engagement, is

run back so as to enable the clutch members to be disengaged from oneanother as shown The sleeve Z is then turned say day inserting a toinmyinto one of the holes Z in the sleeve clutch, until the desired throw ofthe eccentric has been ob tained, the transverse slot above referred topermitting of the turning of the sleeve during this operation. Theclutch-parts are now brought into mutual engagement again,

It will be understood that by means oi a slot such as d the angularmovement of the toggles and, therefore, the travel of the can be broughtdown to any required minimum;

The angular movement of the toggles is capable of independent adjustmentby raising or lowering the stroke adjusting block it by means of itsscrew 72 and hand-wheel L usual, The adjustment obtainable by means ofthe sheave Z combined with that obtainabl by means of the strokeadjusting i ii 1 gives r; very wide range. In some cases, however, themeans for adjusting the block k may be dispensed with, the whole of theadjustment of the table-stroke being .then obtained by means ottheeccentric sheave. The clutchparts Z and Z are arranged exteriorly to thehead motion so as to be readilv accessible and this without dismantlingany part of the machine.

As a ready means of ascertaining the length of stroke of the table thereis provided an indicator consisting of a slide rod n fixed to thebearing 5 and having slidably mounted thereon two stops nand arespectively. The stop a carries a plate- 21 provided wi h scale, Theswivel-head is provided with a nib 9 Thus, when the table isreciprocating the stops are slidden along the rod until hey are justlightly touched by the nib and mark on the stop a is then read oil onthe scale. The scale is so arranged that the reading indicates thelength of stroke of the nib 5 and, therefore, that of the table.

Where two or more tables are being used. the indicator is particularlyuseful bee t affords a ready and quick method 0:? justing the strokes sothat they either agree r differ by a predetermined amount, '.Ol111lnecessary or desirable.

It will be obvious that the above-desc ed details of the machine may bemodified without departing from the spirit of the invention,

By arranging the big end of the pitman low down, as shown in thedrawings, the centre of gravity of the machine is lowered. This conducesto smoothness of running of the machine and is desirable in View of thehigh speed which a machine having the above-described improvements canbe run The portions 6 and 79 of the base plate constitute an oil-bath inwhich the pitman and toggles and thrust-bar work.

The machine of this invention is capable of use also in treating slimesand mineral residues.

I claim ln ore concentrating and screening mechanism the combinationwith a reciprocatorv table and a thrust bar connected to and arranged indirect line with said table, of

driving shaft arranged below the thrustbar. an eccentric sheave providedwith an interior slot about said shaft, a circuniferentiallv adjustablesleeve on said shaft and within said slot, said sleeve and sheave beingprovided with co-operating projections arranged so that such adjustmentof said sleeve will correspondingly vary the throw of the eccentricsheave. a pitm an mounted on said eccentric sheave, a yoke fixed on sa dthrust-bar. toggles connecting said pitman with said yoke, a strokeadjusting block. and toggles connecting said pitman with saidstrokeadjusting block, and a spring acting on said. thrust-bar to returnsaid table.

In testimony whereof, I have signed my name to this specification in thepresence of a subscribing witness.

CHARLES JOHN WILLIAMS.

Witness:

H. T. P.

es 0 i

